| Abbreviation | Definition |
|---|---|
| MLES | Multiple Line Encryption System |
| MLR | Master Lock Resettable |
| MLS | Multiple Licensing Service |
| MMH | Multilinear Modular Hashing |
| MNF | Multi-Network Firewall |
| MOD | Methods Of Destruction |
| MOLE | Multichannel Occurrent Logger Evaluator |
| MOP | Means Of Production |
| MOPB | Month of PHP Bugs |
| MOSS | MIME (Multi-purpose Internet Mail Extensions) Object Security Services |
| MOST | Michigan Online Security Training |
| MP | Message Protector |
| MPC | Multi-media Personal Computer |
| MPD | Microsoft Project Database |
| MPL | Minumum Pattern Length |
| MS | Malicious System |
| MSA | Multifunction Security Appliance |
| MSF | Metasploit Framework |
| MSFT | Most Secure Firewall Tester |
| MSS | Managed Security Services |